Improvement in treadles



UNITED STATES PATENT OEEIcEc A GEORGE T. D. BARN-TUM, OF BOSTON,MASSACHUSETTS, AND WILBUR F.

DIAL, OF MONTREAL, CANADA.

'IMPROVEMENT IN TREADLES.

Specification forming part of Letters Patent No. 172,953, dated February1, 1876; application led January 3, 1876. Y

To all whom) it may concern Beit known that we, GEORGE T. D. BARN- iJUM, of Boston, inthe county of Suffolk resents a front elevation,partly in section, on

linec c, Fig. 3, of Our improved treadle-motion, Fig. 2, a side view,partly in section, on line cc m, Fig. l; Fig. 3, a horizontal section ofthe same on the line y y, Fig. 2; and Fig. 4 is a detail side View ofthe ily-Wheel With the actuating eccentric clutches.

Similar letters of reference indicatecorresponding parts.

Ourinvention relates to an improved treadlemotion for sewing-machines,lathes, scrollsaws, and Otherligh't machinery, by which the use of thecrank and balance-wheel may be dispensed with, and a higher rate ofspeed obtained at less expenditure of force than in the present motionsin use.

The invention consists of alternately-swinging treadles, connected bybelts with an intermediate reciprocating shaft, that operates alternately, by belts, in Opposite direction, loose sleeves with endeccentrics, which engage clutches for' imparting, by theiralternatelyreciprocating action, continuous rotary motion to a flangedily-wheel.

In the drawing, A represents twoalternately-swinging treadles that areconnected by strong belts B applied to the rear ends of the treadles toa shaft, C, that is hung to a supporting-frame, D, secured to the underside of the table, of the machine to be driven by our treadle-motion.The belts B are wound in opposite direction On shaft C, and attached atthe ends to the same, for the purpose Of imparting reciprocating rotarymotion to shaft O, which is again connected at both sides of thetreadle-belts with two additional belts, E, that are attachedl and woundin opposite direction to shaft Q, and to sleeves E', which are placed ona sec? ond shaft, C', hung to the front part of frame D.

The belts E, at one side of the treadle-belts, turn their sleeve E' inone direction, while the belts at the otherside turn their sleevessimultaneously in opposite direction, they being, for this purpose,crossed diagonally.

An eccentric, a., at the end of each sleeve E,

engages an encircling band of the sector-shaped arm or clutch F, whichis forced by the eccentricity of the revolving sleeve against thecircumferen tial iian ge b Ofthe'y -Wheel F keyed to shaft C. rThereciprocating rotary motion that is alternately imparted by thebelt-connection -With shaft G to the sleeves, actuates also the clutchesalternately inopposite direction, each clutch throwing the iiy-wheel inone direction, While the other clutch is returned, so that a continuousrotary motion of the saine is Obtained. The return of the clutches isassisted.

and accelerated by suitablesprings d that are attached to the clutchends and sleeves. n

The treadles may be started from any position, as there is nocrank-connection that requires to be thrown oft' the centers.

The ily-Wheel can only be revolved in one I direction as soon as poweris applied to the treadles, which makes the device specially useful tosewing and other machines, where the motion must be always in the samedirection, while the speed and power that may be imparted make themachine applicable to lathes, scroll-saws, and similar machinery. A

land impart continuous rotary motion to the same, substantially in themanner and for the purpose set forth.-

GEORGE THOMAS DIXIE BARNJUM. WILBURFISKE DIAL.

Witnesses D. BERRY,

GEO. FLANAGAN.

